2. J. D. Power & Associates’ annual quality survey for automobiles found that the industry average number of defects per new car is 1.07. Assume that a sample of 30 new automobiles taken by a particular manufacturer provides the following data on number of defects per car.,0 1 1 2 1 0 2 3 2 1 0 4 3 1 1 0 2 0 0 2 3 0 2 0 2 0 3 1 0 2,a. Provide a 95% confidence interval estimate of the mean number of defects per car for the population of cars produced by this manufacturer.,b. This manufacturer claims that the mean number of defects in its cars is lower than the industry average. Us e this data to verify the claim. What is your conclusion?,
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